Ferns

Rhizomes often stout; creeping, ascending or erect, sometimes scandent or climbing, with non-clathrate scales at apices. Fronds usually monomorphic, less often dimorphic, sometimes scaly or glandular, less commonly hairy. Petioles with numerous round, vascular bundles arranged in a ring, or rarely as few as 3; the adaxial bundles largest. Veins pinnate or forking, free to variously anastomosing; the areoles with or without included veinlets; sori usually round, acrostichoid (covering the entire abaxial surface of the lamina) in a few lineages; usually indusiate, sometimes exindusiate. Indusia, when present, round-reniform or peltate. Sporangia with 3-rowed, short to long stalks; spores reniform, monolete, perine winged. (information from Wikipedia)